https://www.cnbc.com/2019/01/03/apples-iphone-sales-warning-crushing-european-chip-stocks-ams-dialog.html > European chip stocks tumbled on Thursday after Apple cut its first-quarter revenue guidance citing weaker-than-expected iPhone sales and slowing economic growth in China. > Austrian chipmaker AMS nosedived 19 percent while Swiss firm STMicroelectronics dropped around 7 percent. Both companies are semiconductor suppliers for Apple devices.